To the Editor: Recreational use of 3,4-methylenedioxymethamphetamine (MDMA, or “ecstasy”), a hallucinogen, has increased both in Europe and the United States.1 This substance is manufactured in illicit laboratories from a variety of organic ketone precursors. MDMA, which is structurally related both to the stimulant amphetamine and to the hallucinogen mescaline, promotes the release of both...